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Pcs Research Group Interview Questions

The questions to prepare for Pcs Research Group interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

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1
SQL & Data ManipulationStart here. 9 questions · ~88 min
2
Coding8 questions · ~78 min
Prime Number ProgramEasy
Practice

Determine whether an integer is prime using trial division up to the square root.

ProgrammingPcs Research Group
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3
Machine Learning9 questions · ~88 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffPcs Research Group
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4
A/B Testing & Experimentation4 questions · ~39 min
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchPcs Research Group
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5
Metrics4 questions · ~39 min
First Checks for Metric DropsEasy

Outline the first checks to diagnose a sudden drop in a core product metric, starting with data quality, scope, and decomposition.

Lagging IndicatorsLeading IndicatorsDiagnosisPcs Research Group
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6
Statistics & Probability6 questions · ~59 min
Interpreting P Values in TestingEasy

Explain what a p-value means in hypothesis testing and how it relates to statistical significance.

Hypothesis TestingStatistical SignificanceP-ValuesPcs Research Group
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7
More topics10 questions · ~98 min
Prioritize an Overloaded RoadmapHard

A framework for prioritizing an overloaded roadmap and making explicit trade-offs about what gets built first.

Feature PrioritizationMVPProduct VisionPcs Research Group
Choose the Right Evaluation MetricsEasy

Pick the right metrics to evaluate a machine learning model and explain why they fit the problem.

PrecisionAccuracyRecallPcs Research Group
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